IL42367A - A predominantly monaxially oriented film of a thermoplastic material and a process for preparing it - Google Patents

A predominantly monaxially oriented film of a thermoplastic material and a process for preparing it

Info

Publication number
IL42367A
IL42367A IL42367A IL4236773A IL42367A IL 42367 A IL42367 A IL 42367A IL 42367 A IL42367 A IL 42367A IL 4236773 A IL4236773 A IL 4236773A IL 42367 A IL42367 A IL 42367A
Authority
IL
Israel
Prior art keywords
die
mandrel
film
tube
rotated
Prior art date
Application number
IL42367A
Original Assignee
Leer Koninklijke Emballage
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Leer Koninklijke Emballage filed Critical Leer Koninklijke Emballage
Publication of IL42367A publication Critical patent/IL42367A/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/33—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles with parts rotatable relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/902—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies internally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/908—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article characterised by calibrator surface, e.g. structure or holes for lubrication, cooling or venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0063—Cutting longitudinally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

1414785 Helically oriented tubular films; laminates KONINKLIJKE EMBALLAGE INDUSTRIE VAN LEER BV 31 May 1973 [31 May 1972] 25403/72 Headings B5B B5A and B5N Tubular film is extruded from die 1, inflated, and collapsed by nip rollers 8 and oriented helically by relative rotational movement, about the axis of extrusion, between die 1 and nip rollers 8. At least one mandrel is used to maintain the required diameter; in the illustrated embodiment two mandrels 3 and 4 are used. The mandrel(s) is (are) rotatable about the extrusion axis and coolable, for instance by water supplied via pipes 6. Cooling air is supplied to the outer surface of the film, as it passes between die and mandrel, by means of air ring 10. Internal heater 7 may be used if required. If more than one mandrel is used they may be rotatable independently of each other and may even rotate in the sense opposite to that of the die or nip rollers. The process is disclosed particularly for films of polypropylene and polyethylene. The tubular film produced is helically oriented, the direction of orientation forming an angle of at least 10 degrees with the axis of the tube. In one embodiment a polyurethane adhesive is introduced via the mandrel and sprayed on to the inner surface of the film. When the film is collapsed it sticks together to form a laminate. [GB1414785A]

Claims (9)

1. - A substantially monaxially oriented tubular film tube or composite film tube of a thermoplastics material extruded through an annula die , wherein the direction of orientation within the tube follows a helical path which is inclined to the axis of the tube at an angle of a least 10°.
2. A laminate formed by internally bonding together opposite side portions of a tubular film according to claim 1, in face to face contact whereby the orientation direction of one layer makes an angle with the orientation direction of the other layer. 3. A laminate formed from at least two substantially monaxially oriented layers of thermoplastics materials each extruded through an annular die, wherein the orientation directions of the layers are at an angle to each other, and the orientation directio of each layer and scratch lines formed in that layer by contact with a support mandrel during manufacture thereof are at an angle within the range of 1° to 89° to each other. 4. A laminate according to claim 2 or 3 wherein the orientation directions of two of the layers are at right angles to each other. 5. A method of manufacturing a substantially monaxially oriented film of thermoplastic material In accordance with claim 1, comprising extruding a tubular film of thermoplastics material above its melting temperature through an annular film die, inflating the tubular film with a gas, radially supporting the tubular film with at leas one cooled mandrel , partially cooling the film with a stream of gas , directed against the external surface of the tubular film between the die and mandrel nearest thereto, collapsing the tube to flat form and hauling it 42367/2 - 1
3. - off with a nip roll assembly and rotating either the die or the nip roll assembly in a plane perpendicular to the axis of extrusion , continuously in one direction at a constan speed relative to the other of the die or nip roll assembly , whereby the film is stretched helically and the direction of orientation is at an angle of at least 10° to the tube axis. 6. A method according to claim 5, wherein the film is supported by a single mandrel which is rotated in said one direction at a spee which is different to the speed at which the die or the nip roll assembly is rotated. 7, A method according to claim 5, wherei the tubular film is supported internally by two separate mandrels* S. A method according to claim 5 to 7, wherein the film is a polyole inic film. 9. A metho according to claim 5# 7 or 8 wherein there are two o more mandrels, the nip roll assembly and the internal mandrel farthest from th die are rotated, and the internal mandrel nearest to the die and the die are kept stationary. 10. A met od according to claim 5, 7 or 8 wherein there are two or more mandrels , the mandrel nearest to the die and the die are rotated and the nip roll assembly and the mandrel farthest from the die are kept stationary. 11. A method according to claim 5 or 7 wherein there are two or more mandrels, the mandrel nearest to the die and the nip roll assembly are rotated in opposite directions and the mandrel farthest from the die and the die are kept stationary. 12. A method according to claim 5, 7 or 8, wherein there are two or more mandrels, the mandrel farthest from the die, the mandrel nearest to fee di , and the die are rotated and the nip roll assembly is kept stationary. 423*7/2 - 1
4. - 13. A method according to claim 5 or 7 or 8 wherein there are two or more mandrels, the nip roll assembly and the mandrel farthest from the die are rotated i one direction within a framework which is rotated in the opposite direction, and the mandrel nearest to the di and the die are rotated in the opposite direction. 14. A method according to any of claims 5 to 13 wherein at least one mandrel has a knife edge facing the die and has a surface roughness of at least 5 micro inches CIA. 1
5. A method according to claim 6, wherein the nip roll assembly is rotated and the die is kept stationary. 1
6. A method according to any of claims 5 or 7 to 14, wherein the mandrel nearest to the die and or the mandrel farthest from the die are cooled. 1
7. A method according to any of claims 5 , or 7 to 14, wherein air is blown on to the outer surface of the extrudate between the die and the mandrel nearest to the die through an air ring. 1
8. Apparatus for performing the method according to claim 5, comprising die means for extruding a tube of thermoplastic material, means for maintaining sufficient gas pressure within said tube to prevent it collapsing, rotatable assembly for hauling off said tube, one or more mandrels including at least one rotatable mandrel, means for cooling the, or at least one of the mandrel, and means for blowing gas on to the outer surface of the film between die and mandrel nearest to the di , the die means , the rotatable mandrel and haul-off assembly being rotatable in respective planes perpendicular to the axis of extrusion. 42367/2 - 15 1
9. Apparatus according to claim 18, including means for introducing gas into spaces defined within the tube and between spaced parts of the apparatus, and means for heating the inner surface of the tube. 20. A substantially monaxially oriented tubular thermoplastics film according to claim 1 and substantially as herein described. 21. A method of manufacturing monaxially oriented thermoplastics film substantially as herein described. 22. Apparatus for making substantially monaxially oriented thermoplastics film substantially as herein described with reference to Figure 2 of the accompanying drawing. For the Applicants PARTNERS SC:CB
IL42367A 1972-05-31 1973-05-28 A predominantly monaxially oriented film of a thermoplastic material and a process for preparing it IL42367A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2540372A GB1414785A (en) 1972-05-31 1972-05-31 Predominantly monaxially oriented film of a thermoplastic material and a process of preparing same

Publications (1)

Publication Number Publication Date
IL42367A true IL42367A (en) 1976-04-30

Family

ID=10227124

Family Applications (1)

Application Number Title Priority Date Filing Date
IL42367A IL42367A (en) 1972-05-31 1973-05-28 A predominantly monaxially oriented film of a thermoplastic material and a process for preparing it

Country Status (14)

Country Link
JP (1) JPS5339907B2 (en)
AR (2) AR201557A1 (en)
BE (1) BE800273A (en)
BR (1) BR7304093D0 (en)
CA (1) CA1021916A (en)
DE (1) DE2327761C3 (en)
ES (1) ES415181A1 (en)
FR (1) FR2186339B1 (en)
GB (1) GB1414785A (en)
IL (1) IL42367A (en)
IT (1) IT986387B (en)
NL (1) NL7307487A (en)
SE (2) SE403989B (en)
ZA (1) ZA733585B (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1495380A (en) * 1976-01-23 1977-12-14 Mobil Oil Corp Low density polyethylene film laminates
GB1580697A (en) 1976-10-27 1980-12-03 Leer Koninklijke Emballage Treatment of polymeric film laminates
JPS6043301B2 (en) 1978-08-31 1985-09-27 三井化学株式会社 Multilayer laminated film and its manufacturing method
AR219554A1 (en) * 1978-10-17 1980-08-29 Singer Aronovici A MANUFACTURING PROCEDURE FOR A FILM OF MULTIPLE CROSSED STRATA AND PRODUCT OBTAINED
US4605165A (en) * 1984-06-13 1986-08-12 International Flavors & Fragrances Inc. Constant rate volatile composition dispensing article and process for using same
US4614299A (en) * 1984-06-13 1986-09-30 International Flavors & Fragrances Inc. Article which dispenses at a constant rate a volatile composition, and process for using same
GB8602493D0 (en) * 1986-02-01 1986-03-05 Silberline Ltd Producing polymer film laminates
US5108814A (en) * 1987-09-14 1992-04-28 Tredegar Industries, Inc. Embossed oriented film
US5024799A (en) * 1987-09-14 1991-06-18 Tredegar Industries, Inc. Method for producing an embossed oriented film
KR920001587B1 (en) * 1988-03-14 1992-02-20 미쓰이 세끼유 가가꾸 고오교오 가부시끼가이샤 Poly propylene oriented crossing film and fastening tape for paper chaper using it
GB8815083D0 (en) * 1988-06-24 1988-08-03 Rasmussen O B Method & apparatus for helical cutting of lay-flat flexible tubular sheet of polymer material
US5372268A (en) * 1989-07-20 1994-12-13 Minnesota Mining And Manufacturing Pull tab innerseal
DE102012015462A1 (en) 2012-08-07 2014-02-13 Reifenhäuser GmbH & Co. KG Maschinenfabrik Blown film plant, process for producing a blown film web and film produced therewith

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2943356A (en) * 1955-09-30 1960-07-05 Rasmussen Ole-Bendt Method of manufacturing a thin band of a high molecular substance which is axially orientated in another direction than the length direction
NL302698A (en) * 1962-12-31 1900-01-01
GB1046749A (en) * 1963-09-30 1966-10-26 Amut Spa Apparatus for the withdrawal of a tubular film of plastics material from an extruder head and for collection of the withdrawn film
DE1504791A1 (en) * 1964-09-05 1969-10-16 Reifenhaeuser Kg Blown film line
FR1535456A (en) * 1965-10-26 1968-08-09 Du Pont Canada Thermoplastic laminated film having improved resistance to tear propagation

Also Published As

Publication number Publication date
ES415181A1 (en) 1976-06-01
ZA733585B (en) 1974-04-24
GB1414785A (en) 1975-11-19
AR203280A1 (en) 1975-08-29
CA1021916A (en) 1977-12-06
SE403989B (en) 1978-09-18
JPS4961251A (en) 1974-06-13
BR7304093D0 (en) 1974-07-18
SE7611491L (en) 1976-10-15
AU5629473A (en) 1974-12-05
FR2186339B1 (en) 1977-02-11
FR2186339A1 (en) 1974-01-11
DE2327761C3 (en) 1982-01-28
SE418824B (en) 1981-06-29
IT986387B (en) 1975-01-30
DE2327761A1 (en) 1973-12-13
DE2327761B2 (en) 1981-05-14
BE800273A (en) 1973-11-30
AR201557A1 (en) 1975-03-31
JPS5339907B2 (en) 1978-10-24
NL7307487A (en) 1973-12-04

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